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Vulnerability record · CVE-2026-55401 · published 13 August 2026

CVE-2026-55401: Absolute secure access null pointer dereference vulnerability

Absolute · Secure Access

CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful attack, the Secure Access server is still able to accept connections and is still able to issue a failover to connected clients. ‍ https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

6.9 CVSS 4.0 Medium EPSS 0.40% · top 68.1% CWE-476 · NULL pointer dereference
6.9CVSS 4.0 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
4 Sep 2026Last modified by NVD

Description

CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful attack, the Secure Access server is still able to accept connections and is still able to issue a failover to connected clients. ‍ https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-55401 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-55402Absolute secure access out-of-bounds read vulnerabilityCVE-2026-55402 is an out of bounds read vulnerability in Secure Access servers prior to version 14.57. Attackers with an ‘in the middle’ position can…EPSS 0.40%8.7CVE-2026-33445Absolute secure access uncontrolled resource consumption vulnerabilityCVE-2026-33445 is a memory management vulnerability in Secure Access servers prior to 14.55. Attackers with an intimate knowledge of and total contro…EPSS 0.40%8.7CVE-2025-49080Absolute secure access vulnerabilityThere is a memory management vulnerability in Absolute Secure Access server versions 9.0 to 13.54. Attackers with network access to the server can ca…EPSS 0.37%8.5CVE-2026-40952Absolute secure access incorrect default permissions vulnerabilityCVE-2026-40952 is a privilege misconfiguration in the Secure Access installer for the Windows client and server prior to version 14.55. Attackers wit…EPSS 0.14%8.5CVE-2026-33451Absolute secure access out-of-bounds read vulnerabilityCVE-2026-33451 is an arbitrary read/write vulnerability in the Secure Access Windows client prior to 14.50. Attackers with local control of the Windo…EPSS 0.15%8.2CVE-2025-59595Absolute secure access improper input validation vulnerabilityCVE-2025-59595 is an internally discovered denial of service vulnerability in versions of Secure Access prior to 14.12. An attacker can send a specia…EPSS 0.34%7.1CVE-2026-33443Absolute secure access uncontrolled resource consumption vulnerabilityCVE-2026-33443 is a memory management error in Secure Access servers prior to 14.55. Attackers with an intimate knowledge of and total control over t…EPSS 0.37%7.1CVE-2026-40950Absolute secure access stack-based buffer overflow vulnerabilityCVE-2026-40950 is a buffer overflow vulnerability in the Secure Access server prior to 14.50. Attackers with control of a modified client can send a …EPSS 0.42%

Source: NIST National Vulnerability Database (record CVE-2026-55401), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.